The Wilhelm scream is a stock sound effect first used in 1951 for the film Distant Drums. Actor-singer Sheb Wooley is considered to be the most likely voice actor for the scream, having appeared on a memo as a voice extra for the film. In "The Charge at Feather River" (1953), the scream is heard when a soldier named Pvt. Wilhelm (played by Ralph Brooke) gets shot in the leg by an arrow. (Source: Wikipedia/Hollywood Lost and Found)